3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(preg_grep('/.*/u', ['foo', 'bar'])); echo preg_last_error_msg(), "\n\n"; var_dump(preg_grep('/.*/u', ['foo', hex2bin('ff'), 'bar'])); echo preg_last_error_msg(), "\n\n";
Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.30, 8.2.0 - 8.2.25, 8.3.0 - 8.3.13
array(2) { [0]=> string(3) "foo" [1]=> string(3) "bar" } No error array(1) { [0]=> string(3) "foo" } Malformed UTF-8 characters, possibly incorrectly encoded
preferences:
56.13 ms | 406 KiB | 5 Q